<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>新浪</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }

        .box {
            width: 1000px;
            margin: 0 auto;
        }

        div>img {
            display: block;
            width: 100%;
            height: 100%;
        }

        .ad-l,
        .ad-r {
            position: fixed;
            top: 50%;
            margin-top: -144px;
            width: 120px;
            height: 288px;
        }
        .ad-l{
            right: 50%;
            margin-right: 600px;
        }
        .ad-r{
            left: 50%;
            margin-left: 600px;
        }
    </style>
</head>

<body>
    <div class="box"><img src="./images/box.png" alt=""></div>
    <div class="ad-l"><img src="./images/ad-l.png" alt=""></div>
    <div class="ad-r"><img src="./images/ad-r.png" alt=""></div>
</body>

</html>